Miguel de Icaza recently admitted in an interview that they have abandoned the development of Moonlight.
Moonlight was an open source project aimed to bring Silverlight capabilities to Linux platform.
It had moderate success with simple projects but always struggled to keep up with the development of the Silverlight platform on Windows and OS X platforms.
Microsoft Silverlight however never became popular amongst the developers. There are very few projects out there using it as a base. Netflix is one of them.
Microsoft itself has shown little interest in promoting Silverlight in the recent times. They are promoting standard web technologies with their Internet Explorer 10 and Windows 8 updates.